Interchangeable punch and die and retainer for same



J y 9 D. v. S'IV'ELLIN 2,380,343

INTERCHANGEABLE PUNCH AND DIE AND RETAINER FOR SAME Original Filed March6, 1944 Pam [c 1/ Sic/)2)? M war/veg Patented July 10, 1945INTERGHANGEABLE PUNCH AND DIE AND RETAINER FOR SAME Donmic V. Steilin,Bronx, N. Y.

Original application March 6, 194.4, Serial No.

525.233, now Patent No. 2,864,401, dated December 5, 1944.

Divided and this application June 28, 1944, Serial No. 542,480

7 Claims. '(Cl. 164-118) The present invention pertains to novelinterchangeable punches and dies and; particularly to devices foraccurately locating and retaining the Another object of the invention isto providev interchangeability of the character described by simplemeans requiring'comparatively little time in making a change. Thisobject of the invention is of great importance in. urgent production, asin war work, and in mass production where a given rate of output must ber'naintain'ed in order to yield a-profit. The loss of time incident tochanging of punches and dies for any reason, such as breakage or need ofsharpening, is substantial. A reduction of this loss byuse of thepresent invention results in an important economy in the over-alloperation.

The embodiments disclosed herein include a locking key slidably mountedon the retainer in which the severing member, i. e., the punch or die,is inserted. One end of the lockingm'ember is receivable in a notch orgroove formed in the severing member. The locking member is held by ascrew passed through a slot therein and into the retainer, the slotbeing of such length as to permit the locking member to be drawnjout0f'-' the groove or notch when the bolt is loosened.'.

out dismantling any of the adjoining parts.

non-cylindrical member, it is formed with a lateral notch having astraight bottom. The entering end of the locking member is similarlyshaped, to abut the bottom, and the severing member is thus held fromturning.

Another disclosed means to prevent the severing member from turningconsists of a key received in registering slots formed in the retainerand severing member andrunning lengthwise of the latter. The exposed andof the key is covered by the slidable locking member which in turn, hasan end received in a notch in the severing member. Thus, both thesevering mem- Thus. the severing member can be replaced with- 40. Whenit is desired to hold the severing member against shifting rotatively,as in the case of a 4 a her and the key are held by the locking memberfrom dropping, while the key holds the severing member from turning.

Other forms of the invention as seen in the parent case provide thelocator or key in various positions in the retainer body. The inventionalso embodies various forms 01 keying means as well as several forms oflocking devices therefor.

The invention is fully disclosed by way of example in theiollowing'description and. in the accompanying drawing in which Figure 1is a vertical section of one form of the invention;

Figure 2 is a plan view, partly in section, on the line 2-2 of Figure 1;

Figure 3 is an elevation, partly in section, of a modified lock;

Figure 4 is an elevation of another modified lock;

Figure 5 is an elevation, partly in section, of

another modification;

Figure 6 is a section on th line 6-8 of Figure 5;

Figure 7 is a bottom plan view of the punch, and

Figure 8 is a plan view of the die.

Reference to these views will now be made by use of like characterswhich are employed to designate corresponding parts throughout.

Figure 1 shows a conventional punch and die assembly including a plate Aand a retainer 42 which need not be described in detail. The die isformed in its wall with notch 41 at the face of the retainer 42. On theretainer is mounted a sliding'lock 43 having a square end 44 adapted toenter the notch 4| and abut the bottom thereof.

The member 43 has a lengthwise slot 45 adapted to receive a screw 46which threads into the re- -.talner 42. Where rotational slipping of thesevering member is not to be permitted, the square -end 44, is broughtinto abutment with the straight bottom of the notch 4 I.

'. The sliding lock 48 is preferably made of suitable steel andcarries'at its free end a pin 41 adapted to enter a corresponding recess48 in the i'acelof the retainer 42. This device prevents the slidinglook from sliding on the retainer after it has been set, in the eventthat the screw 48 becom'esloose. In changing the die in the retainer,the complete withdrawal of the lock 43 is permitted by the length of theslot 45 therein.

Similarly, in the punch assembly the punch 40' has a lateral notch 49receiving the sliding lock 50 which is supported and retained in themanher already described.

a rounded entering end 52, and the punch ordie 53 has a correspondinglyshaped receiving notch 54. In the further modification shown in Figure 4the sliding lock 55 is held by a stud I8 on which is mounted atightening nut 61.

More accurate and secure locating oi an intricate punch and die isobtained by the construction shown in Figures 5 and 6. The retainer 80of the die has a vertical key slot ll communicating with the die recess62. The die 63 has a longitudinal or vertical slot 84 adapted toregister with the slot M. A key 8! of such size as to fill both slots isinserted in the slot 64 before the die is inserted in its retainer. Oninsertion of the die, the key also enters the slot 8i and therebylocates the die against rotating.

The locking key is a fiat member 68, similar to those previouslydescribed, mounted on the retainer 60 and adapted to enter a notch 61 inthe die. The key or locator 8B is attached to the retainer by a screw 88passed through a slot 89 in the locator. The latter has a finger piece10 and may also have a stop 1| adapted to enter a recess 1 i in the topof the retainer.

The punch I2 of the assembly is mounted in its retainer 13 in likemanner. It has a longitudinal slot 14 matching with a similar slot II inthe retainer, both slots receiving a key 78 fitted in the punch beforeinserting the punch in the retainer. The exposed portion of the punchhas a notch 11 receiving one end of a locking key 18 mounted on theretainer by a screw I9 in substantially the manner previously described.

Various forms of locators, locating keys, etc., may be interchanged fromone embodiment to another to suit requirements, wherever permitted bythe construction involved.

Although specific embodiments of the invention have been illustrated anddescribed, it will be understood that various alterations in the detailsof construction may be made without departing from the scope of theinvention as indi cated by the appended claims.

What I claim is:

1. In a punch or die assembly, a retainer, a severing member received insaid retainer and having a portion projecting. therefrom, said memberhaving a recess in its lateral wall, and a holding member slidablysupported by said retainer and having an end adapted to enter saidrecess, said holding member having a lengthwise slot, and means passingthrough said slot for fastening said holding member to said retainer,said slot being of such length as to permit said holding member to bedrawn fully outof said recess by lengthwise sliding.

2. In a punch or die assembly, a retainer, a severing member received insaid retainer and having a portion projecting therefrom, said memberhaving a recess in its lateral wall, and a holding member slidablymounted on said member and adapted to enter said recess, said holdingmember having a lengthwise slot therethrough, and a screw passingthrough said slot and into said retainer for tightening said holdingmember in an adjusted position, said slot being of such length as topermit said holding member to be drawn fully out of said recess bylengthwise sliding.

2,380,843 As shown in Figure 3, the sliding lock ll has- 3. In a punchor die assembly, a retainer, a severing member received in said retainerand having a portion projecting therefrom, said member having a recessin its lateral wall, and a holding member slidably mounted on said memeber and adapted to enter said recess, said holdmg member having alengthwise slot therethrough, and a screw passing through said slot andinto said retainer for tightening said holding member in an adjustedposition, said slot being of such length as to permit said holdingmember to be drawn fully out of said recess by lengthwise sliding. saidholding member consisting of spring metal and having a projection at oneend, said retainer having a recess adapted to receive said projection.

4.,In a punch or die assembly, a retainer. a severing member received insaid retainer and having a portion projecting therefrom, said memberhaving a lengthwise slot extending from said recess, said retainerhaving a lengthwise slot adapted to register with the first slot, a keyreceivable in both slots, and a holding member slidably supported bysaid retainer and adapted to enter said recess, whereby to traverse andretain said key.

I 5. In a punch or die assembly, a retainer, a severing member receivedin said retainer and having a portion projecting therefrom, said memberhaving a lengthwise slot extending from said recess, said retainerhaving a lengthwise slot adapted to register with the first slot, a keyreceivable in both slots, and a holding member slidably supported bysaid retainer having an end adapted to enter said recess, whereby totraverse and retain said key, and releasablemeans for securing saidholding member to said retainer.

6. In a punch or die assembly, a retainer, a severing member received insaid retainer and having a portion projecting therefrom, said memberhaving a lengthwise slot extending from said recess, said retainerhaving a lengthwise slot adapted to register with the first slot, a keyreceivable in both slots, and a holding member slidably supported bysaid retainer having an end adapted to enter said recess, whereby totraverse and retain said key, said holding member having a lengthwiseslot, and means passing through said slot for fastening said holdingmember to said retainer, said slot being of such length as to permitsaid holding member to be drawn fully out of said recess.

7. In a punch 'or die assembly, a retainer, a

severing member received in said retainer and having a portionprojecting therefrom, said member having a lengthwise slot extendingfrom said recess, said retainer having a lengthwise slot adapted toregister with the first slot, a key receivable in both slots, and aholding member slidably supported by said retainer and having an endadapted to enter said recess, whereby to traverse and retain said key,and releasable means for securing said holding member to said retainer,the entering end of said holding member being shaped to fit linearlyagainst the bottom of said recess, whereby to prevent rotation of saidsevering member.

DOMNIC V. STELLIN.

